It seems to me game performance could be significantly improved if Zynga would just let us clean things up.
Removing things from the farm. I have a Workstation I cant get rid of, cant sell, and the game hangs up every time I click on it. That is just one of the annoying left over things that clutters up my farm. The Racing Stable is another. ect ect. Every single thing on the farm should be removable or at least storable.
Selling/destroying stuff from Inventory. I have things in inventory left over from quests that can't be sold or destroyed. The farm sign, balloons, baby animal pens, ect, ect. I don't even want to sell them, just get them out of my inventory.
Removing neighbors and friends. This is the most annoying thing ever. I have different neighbors when I play in Facebook compared to Zynga, and different friends lists too. I would like to be able to prune both lists down to a workable list that is the same on both sites.